Triceps Brachii

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Triceps brachii innervationRadial N

lateral head originposterior surface of humerus above radial groove

Triceps brachii insertionolecranon process of ulna

Triceps brachii actionextension of forearm at elbow joint + long head assist in adducting the arm + stabilizing the shoulder joint

medial head originposterior surface of humerus below radial groove

Triceps Brachii headslong head, medial head, lateral head

long head origininfraglenoid tubercle of scapula

Triceps brachii blood supplyDeep brachii A + posterior circumflex humeral A